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A comparative study of quasi-solid nanoclay gel electrolyte and liquid electrolyte dye sensitized solar cells.

机译：准固态纳米粘土凝胶电解质和液体电解质染料敏化太阳能电池的比较研究。

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摘要

Dye sensitized solar cells (DSSCs) are currently being explored as a cheaper alternative to the more common silicon (Si) solar cell technology. In addition to the cost advantages, DSSCs show good performance in low light conditions and are not sensitive to varying angles of incident light like traditional Si cells.;One of the major challenges facing DSSCs is loss of the liquid electrolyte, through evaporation or leakage, which lowers stability and leads to increased degradation. Current research with solid-state and quasi-solid DSSCs has shown success regarding a reduction of electrolyte loss, but at a cost of lower conversion efficiency output. The research work presented in this paper focuses on the effects of using nanoclay material as a gelator in the electrolyte of the DSSC.;The data showed that the quasi-solid cells are more stable than their liquid electrolyte counterparts, and achieved equal or better I-V characteristics. The quasi-solid cells were fabricated with a gel electrolyte that was prepared by adding 7 wt% of Nanoclay, NanomerRTM (1.31PS, montmorillonite clay surface modified with 15--35% octadecylamine and 0.5--5 wt% aminopropyltriethoxysilane, Aldrich) to the iodide/triiodide liquid electrolyte, (Iodolyte AN-50, Solaronix).;Various gel concentrations were tested in order to find the optimal ratio of nanoclay to liquid. The gel electrolyte made with 7 wt% nanoclay was more viscous, but still thin enough to allow injection with a standard syringe. Batches of cells were fabricated with both liquid and gel electrolyte and were evaluated at STC conditions (25°C, 100 mW/cm2) over time. The gel cells achieved efficiencies as high as 9.18% compared to the 9.65% achieved by the liquid cells. After 10 days, the liquid cell decreased to 1.75%, less than 20% of its maximum efficiency. By contrast, the gel cell's efficiency increased for two weeks, and did not decrease to 20% of maximum efficiency until 45 days. After several measurements, the liquid cells showed visible signs of leakage through the sealant, whereas the gel cells did not. This resistance to leakage likely contributed to the improved performance of the quasi-solid cells over time, and is a significant advantage over liquid electrolyte DSSCs.
机译：染料敏化太阳能电池（DSSC）目前正在作为更普通的硅（Si）太阳能电池技术的一种廉价替代品进行研究。除了成本优势外，DSSC像传统的Si电池一样在弱光条件下表现出良好的性能，并且对入射光的变化角度不敏感;; DSSC面临的主要挑战之一是由于蒸发或泄漏导致液体电解质损失，这降低了稳定性并导致降解加剧。固态和准固态DSSC的当前研究表明，在减少电解质损失方面取得了成功，但是其转换效率输出较低。本文的研究工作集中于在DSSC的电解质中使用纳米粘土材料作为胶凝剂的效果;数据表明，准固态电池比其液态电解质更稳定，并获得了相同或更好的IV特征。用凝胶电解质制造准固体电池，该凝胶电解质是通过将7 wt％的Nanoclay，NanomerRTM（1.31PS，经15--35％十八烷基胺和0.5--5 wt％的氨丙基三乙氧基硅烷，Aldrich改性的蒙脱土）制成的。碘化物/三碘化物液体电解质（Iodolyte AN-50，Solaronix）。测试了各种凝胶浓度，以找到纳米粘土与液体的最佳比例。用7 wt％的纳米粘土制成的凝胶电解质粘度更高，但仍然足够薄，可以用标准注射器注射。用液体和凝胶电解质制造一批电池，并随时间在STC条件（25°C，100 mW / cm2）下进行评估。凝胶电池的效率高达9.18％，而液体电池的效率为9.65％。 10天后，液池下降到1.75％，不到其最大效率的20％。相比之下，凝胶细胞的效率提高了两周，直到45天才下降到最大效率的20％。经过几次测量，液体细胞显示出通过密封剂泄漏的明显迹象，而凝胶细胞则没有。随着时间的流逝，这种抗渗漏性可能有助于准固态电池的性能提高，并且与液体电解质DSSC相比，这是一个显着的优势。

著录项

  • 作者

    Main, Laura.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Alternative Energy.;Engineering Electronics and Electrical.;Energy.
  • 学位 M.S.
  • 年度 2012
  • 页码 58 p.
  • 总页数 58
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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